Chuck



Patented Oct. 9, 1923.

FCHHUCK:

" Application akamai-01124, 1922. ksei-curro.51.1.6294.1

ToaZZ/whomz' may concern.

Beit known thatQI, BENGTY M. WV. I-IArTsoN,

Y Aa citizen of the United States, and resident of Hartford, county of Hartford, State of Connecticut, Vhave invented certain new andv useful Improvements in a Chuck, of Whichl the following is a specification.

This invention relates, generally, chucks, for V,instance such as for holding pieces of work or a tool on the spindle of a metal. working machine.

The Vaim of the present .invention isgto provide a chuck which is particularly characterizedby its eXtreme simplicity in construction permitting it to be very cheaply manufactured and "by itsv effectiveness in operation in that the piece to beheld is automatically centered andvsecurely gripped bythe mere act of inserting the piece intoV the chuck. E f v Y l In the accompanying drawing, -Whereinf I have shown for illustrative purposes'several applications offl the invention-,if I

Fig. 1 is ya View showing my improved chuck applied toa centering machine, only so much of the machine being illustrated as is required to showone embodiment of the.v

invention, and the chuck together with the spindle holding the same beingin longitudinal central section Fig. 2 is a cross sectional-view oftheV chuck taken substantiallyon line 2-2 of F ig.` l; t. Y Y

Figs. 3 and 4 are views similar to Fig. l, but showing different kinds o-fpieces being Yheld in the chuck.

Referring to the drawing in detail, a

Y denotes a suitable support or bearingimemf ber. inwhich is journalled a rotary member b here shown as being in the forni' fof a` d, Z denote rollers Whichfl hollow spindle. constituteaJ rest for supporting the vfree end Y of the'Work in proper position relative to the VVoperating tool, this tool in the present' instance being in the form of a center drill e. The structure so far described forms no part of the present invention, it being here illustrated merely for-theV purpose of show'- ing one use to Which vmay be put.

My k'mproved chuck comprises a member l0 having'a tapered recess or opening 11, the- Wall of which is provided with a thread preferably of relatively Vne pitch. In the present illustrative disclosure of the in`` vention,. the Wall ofthe recess v11 isY prof are employed desired manner,

spindle.v

simplicity my improved "chuck,

' the tapered videdfvvith thread, although itis te l 1- be understoodthat anyV desired number of threads may beVv used. In one manner of speaking, thesev threads constitute ribs or serrations havingedges or teeth adapted to bite into the piece tobeheld. By preference, the chuck comprises a single Vb-lock or piece of mfetal, thus permitting it to be manufactured at a very low cost. The chuck may be secured to the spindlein any suitable* or but by Way of exemplifica tion I haveshown it as having a bayonet- `to receive slot l2f adapted the spindle chuckWith a plurality of threads,it Will be,

seen thatwhen the Work is positioned within the recess, the. threads will grip the Work at Yaplurality of angularly spaced apart points land hold' the workin axial. alinement with a stud or pin `13 .projecting from ithe internal periphery vof By jprovidingf the.v tapering Wall of i th Y' the center ofrotation lof the Vchuck and the the Work .will begrip-pedat three' points which are Whe-rein the numerals 14C, l5 and 16 denote the places ,Where the respective threads en- `I The chuck is of extreme. and may be very leconomically.'

gage the Work.

'manufactured and readily secured-to'the spindle. Any onefchuck maybe yemployed for holding pieces ofvv'ork of vario-usgdiameters Within a given range.' If desired, a

Where a triple thread is provided, t

equally spaced relativeto the axis of the-cluck, as will be seen from Fig. 2,f

numberv of` chucks having threaded tapering openings of different sizes may be provided v'for insertionyvthin the spindle seas to-'take care ofpieces of work-varying greatly in-` diameters Yor isizes from one another.V

Work of different configurations and dimensions and nds many; useful applications; VFor instance, the chuck may be used to hold a generally round orfovalzknob orhandle, as

Fig. 4.

is securely held in centeredmoved from the chuck.

.9517.. it?, --The chuck lsadapted tohold pieces of It is," off course, obvious that my invention is susceptible of various modifications and chenges'wlnch are Within the. spirit of the invention Without departing from the scopeV of the following claims, it being understood thetthe present disclosure of my invention is by wavy of illustration only and it is not to be taken as' restrictive of my conception. I claim as my invention: l.V A chuck having a tapered recess projvided with zt plurelity'of spiral vribsof relatively line pitch.

Vifiesgeee 21A chuck having a tapered recess pro-l '4. A chuck having'a tapered recess pro- 20 vided with a plurality of thread ribs;

A BENGT ivi W. Hinrson, 

